Dear Arjina,
I’ve replied to your question through email. However, for the sake of the forum community I am answering it again.
It is possible to generate a train of pulses through active mode locked laser. The example (Active Mode Locked Fiber Laser with IM.osd) in OptiSystem Example Library can be used when using a sinusoidal signal to drive the modulator instead of a pulse.
Regards,
Ahmad